Mysticism or dreams and visions make up more than forty percent of  The Bible .  When you understand that a story is really a dream and not to be taken literally,  there is clarity and a more meaningful understanding of the story.  The Book of Jonah is a vision and Jonah was not swallowed up by a whale.   In a vision anything unrealistic can happen.  And  "To be in a fish" is an Idiom  meaning " to be in a dilemma". Scripture  Jonah:1:17

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